Re: How to debug by COM port

Hi Andy,
I still can not connect with Target even if I have set the baud rate down to
19200.
I made a UART cross line because two computers' UART cannot connect
directly.
The normal UART cross line is 9 Pins, but I only used 3 lines, Tx, RX and
Ground. Do you think this is a problem?
TX <------> RX
RX<-------> TX
Ground<-------------> Ground



Thanks.
C.C. Wu

"Andy Allred [MS]" <andyall@xxxxxxxxxxxxxxxxxxxx> ¼¶¼g©ó¶l¥ó·s»D
:eaZ6f6k2FHA.1148@xxxxxxxxxxxxxxxxxxxxxxx
> Try reducing the baud rate to something like 57600 or 19200 in the
boot.ini
> and ensure the machine with winddbg is capable of the same rate.
>
> -andy
>
> --
> Embedded team blog: http://blogs.msdn.com/embedded/
>
> This posting is provided "AS IS" with no warranties, and confers no
rights.
>
>
>
> "C.C. Wu" <cc_wu@xxxxxxxxxxxx> wrote in message
> news:uIGjBlg2FHA.3912@xxxxxxxxxxxxxxxxxxxxxxx
> > Hi all,
> > I'd like to get embedded XP debug infomation of kernel boot procedure. I
> > have installed Windows Debugger Version 6.5.0003.7 in a host computer,
> > and
> > I boot my system from a target computer.
> > The target computer's boot.ini is
> > [boot loader]
> > timeout=0
> > default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS
> > [operating systems]
> > multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Windows XP Embedded" /debug
> > /debugport=com1 /baudrate=115200
> > .
> >
> > I launched WinDbg on my host computer, and executed Kernel Debug, but I
> > can
> > not make host connect with target.
> >
> > Microsoft (R) Windows Debugger Version 6.5.0003.7
> > Copyright (c) Microsoft Corporation. All rights reserved.
> >
> > Opened \\.\COM1
> > Waiting to reconnect...
> >
> >
> > I have tested communcation between them. The host always sends 0x69 0x69
> > 0x69 0x69 0x06 0x00 0x00 0x00...., so the COM port works normally.
> >
> > Does anybody know what's going on with my embedded XP? Do I need some
> > components for kernel debug?
> >
> > Thanks.
> > C.C. Wu
> >
> >
> >
> >
> >
> >
> >
>
>


.

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